Outrider \Out"rid`er\, n.
1. A summoner whose office is to cite men before the sheriff.
[Obs.]
[1913 Webster]
2. One who rides out on horseback, beyond the main group, e.
g., as a scout. --Chaucer.
[1913 Webster +PJC]
3. A servant on horseback attending a carriage.
[1913 Webster]